Here is the full list of all 54 Dragon's Dogma 2 achievements.
Became Sovran of Vernworth.
Obtained Dragon's Dogma.
Earned the affections of 50 people.
Experienced the end of the cycle.
Strengthened a weapon in wyrmfire.
Led the people to safety in the unmoored world.
Overcame all the trials of the unmoored world.
Helped the gigantus walk again.
Witnessed the unmoored world.
Defeated the gigantus in a short span of time.
Acquired a preserved medusa head.
Crossed a cyclopean bridge.
Restored the dead to life at a morgue or charnel house.
Reclaimed your items from the scavenger who stole them from you.
Acquired every maister's teaching.
Changed your vocation to warfarer.
Defeated the headless horseman.
Discovered 50 dungeons.
Witnessed a brawl break out in your dwelling among your admirers.
Acquired a pawn badge.
Collected 80 Seeker's Tokens.
Summoned a harpy, grabbed hold, and took flight.
Grilled every type of meat during the night and day.
Decapitated a medusa.
Soaked in the hot spring.
Petrified a medusa.
Reached Dragonsbreath Tower.
Boarded the phantom oxcart.
Changed your vocation to mystic spearhand.
Changed your vocation to trickster.
Accomplished a miracle for several people all at once.
Found a solution to every conundrum posed by the goddess of riddles.
Revived two pawns simultaneously.
Changed your vocation to magick archer.
Returned to Agamen Volcanic Island.
Reached Drabnir's Grotto.
Passed through the gate at the border.
Used illicit means to pass through the gate at the border.
Taught your pawn a specialization.
Reached the maximum rank in a vocation.
Raised a person's affinity to the maximum.
Used a Wakestone to restore the dead to life.
Purchased a dwelling of your own.
Attended a palace masquerade in formal raiment.
Entered the rose chateau.
Set a pawn quest.
Boarded an oxcart.
Used a Ferrystone.
Took flight on griffin wing a second time.
Changed your vocation.
Arrived in Vernworth.
Went camping.
Regained your memories of receiving the Arisen's charge.
Escaped the bonds of slavery.